16

I would love to insert a default value into a column with data type datetime2(7). However, because my website is hosted on a server in a different timezone, the getdate function doesn't work properly. I wonder if there is a solution to this. I have done some research and found two ways. First is to use GetUTCDate() function. However, I would need to do the conversion when I display the information. I am sure my web application is used for only my timezone. So I would like to avoid this. Second way, this is the closest I could get this done by using SwitchOffSet function:

CREATE TABLE [dbo].[Test_Date](
[test_id] [int] NOT NULL,
[test_date] [datetime2](7) NOT NULL
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[Test_Date] ADD  CONSTRAINT [DF_Test_Date_test_date]  DEFAULT (switchoffset(CONVERT([datetimeoffset],getutcdate()),'+13:00')) FOR [test_date]
GO

However, my problem is the +13:00 cause in the next few months, it will be +12:00 cause of the day light saving time change. As a result, I would need to change it every time. Anybody has a solution to this?

Thanks.

loveprogramming
  • 538
  • 2
  • 5
  • 22

6 Answers6

37
SELECT GETDATE() AT TIME ZONE 'UTC' AT TIME ZONE 'Central Standard Time'

You need the first 'AT TIME ZONE UTC' in order to tell the DB what the value currently is in, so it knows how to get to the second given time zone, 'Central Standard Time' in my example.

Don Cheadle
  • 5,224
  • 5
  • 39
  • 54
18

You can use SYSDATETIMEOFFSET function

select SYSDATETIMEOFFSET()

MSDN description:

Returns a datetimeoffset(7) value that contains the date and time of the computer on which the instance of SQL Server is running. The time zone offset is included.

More on MSDN.

Based on clarification in the comment below:

Because you want to store the local time of the client, SQL Server has no way of knowing what is your local time. The best option that would work best would be to send the current time from the client each time.

Szymon
  • 42,577
  • 16
  • 96
  • 114
  • sysdatetimeoffset() doesn't solve my problem. It will tell me what the time offset in my column compared to UTC. Something like 2007-04-30 13:10:02.0474381 -07:00. It's not what I am want to achieve. I would like to insert the date and time for my timezone. Thanks – loveprogramming Nov 20 '13 at 02:49
  • Actually, I do know the location of my clients and it will always be in my timezone. My web application doesn't allow any registration from outside. Thanks – loveprogramming Nov 20 '13 at 20:45
11

Since Sql Server 2016 you can use AT TIME ZONE...

SELECT CONVERT(datetime2(0), '2015-03-29T01:01:00', 126)     
AT TIME ZONE 'Central European Standard Time';

... as specified in the documentation

Mario Levrero
  • 3,345
  • 4
  • 26
  • 57
  • but more practically, you're converting a DATETIME value... so you need to give the "UTC" timezone of the currently value first, so it knows how to get to the next. – Don Cheadle Apr 24 '19 at 15:03
3

Just store the data in UTC, and use a calendar table to calculate offsets when you read the data (see these tips: part 1, part 2, part 3). Related Q & A:

Aaron Bertrand
  • 272,866
  • 37
  • 466
  • 490
0

since the db timezone info is different with your web server, its best you explicitly pass your desired datetime value from your web app to the db, instead of using db server-side default function.

Kelmen
  • 1,053
  • 1
  • 11
  • 24
  • This is the most obvious way. But I tried to avoid this if possible. Already written so many stored procedures without the datetime parameter. Thanks. – loveprogramming Nov 20 '13 at 02:52
0

Getdate() function to get date for Japan Standard Time Zone[JST]

SELECT CAST( GETDATE() AT TIME ZONE 'UTC' AT TIME ZONE 'Asia/Tokyo' AS Date )
Shiwani
  • 51
  • 1
  • 3